48
Parameter setting
Sensor Vari KNX 3L-TH-D
• Status: 19.10.2016 • Errors excepted. Subject to technical changes.
Activate monitoring of the coolant temperature if required. The menu for setting the
monitoring is displayed.
6.10.1. Cooling medium temperature monitoring
A threshold value can be set for the temperature of the coolant, which is based on the
current dewpoint temperature (offset/deviation). The switching output of the coolant
temperature monitoring system can provide a warning prior to any build-up of conden-
sation in the system, and/or activate appropriate countermeasures.
Threshold value
Threshold value = dewpoint tempe offset
Set, in which cases an
offset
received via object is to be retained. Please note that the
setting "After power supply restoration and programming" should not be used for the
initial start-up, as the factory settings are always used until the first communication
(setting via objects is ignored).
During initial commissioning, an
offset
must be defined which is valid until the first
communication of a new offset. For units which have already been taken into service,
the last communicated offset can be used.
A set offset will be retained until a new value or a change is transferred. The current
value is saved in EEPROM, so that it is retained in the event of a power supply failure
and will be available once the power supply is restored.
Sending pattern
• never
• periodically
• on change
• on change and periodically
At and above change of
(if sent on change)
0.1°C • 0.2°C • 0.5°C • 1.0°C • 2.0°C • 5.0°C
Send cycle
(if sent periodically)
5 s • 10 s • 30 s • 1 min • … • 2 h
Use monitoring of the coolant temperature
No • Yes
Maintain the
offset received via communication object
• never
• after power supply restoration
• after power supply restoration and
programming
.
Start offset in °C
valid until first communication
0...200; 30
Increment for offset change
0.1°C • 0.2°C • 0.3°C • 0.4°C • 0.5°C • 1°C •
2°C • 3°C • 4°C • 5°C
Hysteresis setting
in % • absolute
Summary of Contents for Vari KNX 3L-TH-D
Page 5: ...4 Clarification of signs ...
